package com.whut.gkd.filter;

import com.whut.gkd.bean.User;

import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;

public class LoginFilter implements Filter {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) servletRequest;
        HttpServletResponse response = (HttpServletResponse) servletResponse;
        HttpSession session = request.getSession();
        User user = (User) session.getAttribute("user");
        String url = request.getRequestURL().toString();
        if(user == null && url.indexOf("login.do") == -1){
            response.sendRedirect("../login.jsp");
        }else{
            filterChain.doFilter(request,response);
        }
    }

    @Override
    public void destroy() {

    }
}
